FAMILIALRY EXPLAINED IN CONNECTION WITH BIOGRAPHICAL
SKETCHES OF THE MOST EMINENT ASTRONOMERS.

WITH NUMEROUS ENGRAVINGS.

BY DENISON OLMSTED, LL.D.,

PROFESSOR OF NATURAL PHILOSOPHY AND ASTRONOMY IN YALE COLLEGE

Bebised Edition.

INCLUDING THE LATEST DISCOVERIES.

NEW YORK:

HARPER & BROTHERS, PUBLISHERS,

329 & 331 PEARL STREET,

FRANKLIN SQUARE.

Entered according to Act of Congress, in the year 1840, by MARSH, CAPEN, LYON, AND WEBP,

in the Clerk's Office of the District Court of Massachusetts.